/*
 * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license, you may redistribute it
 * and/or modify it under version 3 of the License, or (at your option), any later version.
 */

#include "GenericBuffUtils.h"
#include "PlayerbotAIConfig.h"

#include <map>

#include "Player.h"
#include "Group.h"
#include "SpellMgr.h"
#include "Chat.h"
#include "PlayerbotAI.h"
#include "ServerFacade.h"
#include "AiObjectContext.h"
#include "Value.h"
#include "Config.h"
#include "PlayerbotTextMgr.h"

namespace ai::buff
{
    std::string MakeAuraQualifierForBuff(std::string const& name)
    {
        // Paladin
        if (name == "blessing of kings")        return "blessing of kings,greater blessing of kings";
        if (name == "blessing of might")        return "blessing of might,greater blessing of might";
        if (name == "blessing of wisdom")       return "blessing of wisdom,greater blessing of wisdom";
        if (name == "blessing of sanctuary")    return "blessing of sanctuary,greater blessing of sanctuary";
        // Druid
        if (name == "mark of the wild")         return "mark of the wild,gift of the wild";
        // Mage
        if (name == "arcane intellect")         return "arcane intellect,arcane brilliance";
        // Priest
        if (name == "power word: fortitude")    return "power word: fortitude,prayer of fortitude";

        return name;
    }

    std::string GroupVariantFor(std::string const& name)
    {
        // Paladin
        if (name == "blessing of kings")        return "greater blessing of kings";
        if (name == "blessing of might")        return "greater blessing of might";
        if (name == "blessing of wisdom")       return "greater blessing of wisdom";
        if (name == "blessing of sanctuary")    return "greater blessing of sanctuary";
        // Druid
        if (name == "mark of the wild")         return "gift of the wild";
        // Mage
        if (name == "arcane intellect")         return "arcane brilliance";
        // Priest
        if (name == "power word: fortitude")    return "prayer of fortitude";

        return std::string();
    }

    bool HasRequiredReagents(Player* bot, uint32 spellId)
    {
        if (!spellId)
            return false;

        if (SpellInfo const* info = sSpellMgr->GetSpellInfo(spellId))
        {
            for (int i = 0; i < MAX_SPELL_REAGENTS; ++i)
            {
                if (info->Reagent[i] > 0)
                {
                    uint32 const itemId = info->Reagent[i];
                    int32  const need   = info->ReagentCount[i];
                    if ((int32)bot->GetItemCount(itemId, false) < need)
                        return false;
                }
            }
            // No reagent required
            return true;
        }
        return false;
    }

    std::string UpgradeToGroupIfAppropriate(
        Player* bot,
        PlayerbotAI* botAI,
        std::string const& baseName,
        bool announceOnMissing,
        std::function<void(std::string const&)> announce)
    {
        std::string castName = baseName;
        Group* g = bot->GetGroup();
        if (!g || g->GetMembersCount() < static_cast<uint32>(sPlayerbotAIConfig->minBotsForGreaterBuff))
            return castName; // Group too small: stay in solo mode

        if (std::string const groupName = GroupVariantFor(baseName); !groupName.empty())
        {
            uint32 const groupVariantSpellId = botAI->GetAiObjectContext()
            ->GetValue<uint32>("spell id", groupName)->Get();

            // We check usefulness on the **basic** buff (not the greater version),
            // because "spell cast useful" may return false for the greater variant.
            bool const usefulBase = botAI->GetAiObjectContext()
            ->GetValue<bool>("spell cast useful", baseName)->Get();

            if (groupVariantSpellId && HasRequiredReagents(bot, groupVariantSpellId))
            {
                // Learned + reagents OK -> switch to greater
                return groupName;
            }

            // Missing reagents -> announce if (a) greater is known, (b) base buff is useful,
            // (c) announce was requested, (d) a callback is provided.
            if (announceOnMissing && groupVariantSpellId && usefulBase && announce)
            {
                static std::map<std::pair<uint32, std::string>, time_t> s_lastWarn; // par bot & par buff
                time_t now = std::time(nullptr);
                uint32 botLow = static_cast<uint32>(bot->GetGUID().GetCounter());
                time_t& last = s_lastWarn[ std::make_pair(botLow, groupName) ];
                if (!last || now - last >= sPlayerbotAIConfig->rpWarningCooldown) // Configurable anti-spam
                {
                    // DB Key choice in regard of the buff
                    std::string key;
                    if (groupName.find("greater blessing") != std::string::npos)
                        key = "rp_missing_reagent_greater_blessing";
                    else if (groupName == "gift of the wild")
                        key = "rp_missing_reagent_gift_of_the_wild";
                    else if (groupName == "arcane brilliance")
                        key = "rp_missing_reagent_arcane_brilliance";
                    else
                        key = "rp_missing_reagent_generic";

                    // Placeholders
                    std::map<std::string, std::string> placeholders;
                    placeholders["%group_spell"] = groupName;
                    placeholders["%base_spell"] = baseName;

                    std::string announceText = sPlayerbotTextMgr->GetBotTextOrDefault(key,
                    "Out of components for %group_spell. Using %base_spell!", placeholders);

                    announce(announceText);
                    last = now;
                }
            }
        }
        return castName;
    }
}
